Aquizhastenmultiple-choicequestions,withfivepossibleanswersforeach.Astudentwho is completelyunpreparedrandomlyguessestheanswerforeachquestion.Let Y denote the numberofcorrectresponses. (a) Findtheprobabilitythatthestudentsgets(i)all10,(ii)noneofthequestionscorrect. (b) Findthemeanandstandarddeviationoftheprobabilitydistributionof Y .
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Aquizhastenmultiple-choicequestions,withfivepossibleanswersforeach.Astudentwho is completelyunpreparedrandomlyguessestheanswerforeachquestion.Let Y denote the numberofcorrectresponses.
(a) Findtheprobabilitythatthestudentsgets(i)all10,(ii)noneofthequestionscorrect.
(b) Findthemeanandstandarddeviationoftheprobabilitydistributionof Y .
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Foundations Of Statistics For Data Scientists With R And Python
ISBN: 9780367748456
1st Edition
Authors: Alan Agresti
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